/// <summary>
/// Initializes a new instance of the <see cref="DocumentSearchEngine"/> class.
/// </summary>
/// <param name="data">The data records to be searched.</param>
/// <param name="searchCriteria">The search criteria.</param>
/// <exception cref="ArgumentNullException">
/// data
/// or
/// searchCriteria
/// </exception>
/// <exception cref="ArgumentException">
/// The supplied data is empty.
/// or
/// The supplied searchCriteria is empty.
/// </exception>
public DocumentSearchEngine(IEnumerable<string> data, DocumentSearchCriteria searchCriteria)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (!data.Any())
{
throw new ArgumentException("The supplied data is empty.");
}
if (searchCriteria == null)
{
throw new ArgumentNullException("searchCriteria");
}
if (searchCriteria.IsEmpty())
{
throw new ArgumentException("The supplied searchCriteria is empty.");
}
_searchCriteria = searchCriteria;
_data = data;
}
/// <summary>
/// Runs the search application which allows a user to search by keywords from a text file for any relevant entries.
/// </summary>
private static void Run()
{
try
{
var dataRecords = File.ReadLines("hscic-news.txt");
while (true)
{
Console.WriteLine(
"Please type the words you would like to search for (separated by a space) and press Enter.");
var userInput = Console.ReadLine();
var keywordsParseResult = DocumentSearchCriteriaHelper.TryParseKeywords(userInput);
if (keywordsParseResult == null)
{
WriteErrorMessageToConsole(
"Input validation failed. Please enter the keywords you would like to search for again e.g. Care Summary");
continue;
}
BooleanOperator? searchOperator;
do
{
Console.WriteLine(
"Please enter 1 to search using the 'AND' search type or enter 2 to search using the 'OR' search type.");
userInput = Console.ReadLine();
searchOperator = DocumentSearchCriteriaHelper.TryParseBooleanOperator(userInput);
if (searchOperator == null)
WriteErrorMessageToConsole("Input validation failed. Unrecognised search type.");
} while (searchOperator == null);
var searchCriteria = new DocumentSearchCriteria
{
Keywords = new List<string>(keywordsParseResult),
Operator = searchOperator.Value
};
var searchResults = new DocumentSearchEngine(dataRecords, searchCriteria).ExecuteSearch();
DisplaySearchResults(searchResults);
Console.WriteLine("Type 'E' to exit or 'Enter' to continue");
var readLine = Console.ReadLine();
if (readLine != null && readLine.Equals("e", StringComparison.InvariantCultureIgnoreCase))
break;
}
}
catch (FileNotFoundException ex)
{
Logger.Log(ex.Message);
WriteErrorMessageToConsole(
"File not found. Please make sure that the 'hscic-news.txt' is in the same directory as the application.");
Console.ReadLine();
}
catch (Exception ex)
{
Logger.Log(ex.Message);
WriteErrorMessageToConsole("An error has occured please refer to the log file for more information.");
Console.ReadLine();
}
}